One [allegation] pertains to Iowa state Sen. Kent Sorenson, R-Milo, who Waldron claims was paid $7,500 a month for his role as Iowa state chairman for the Bachmann campaign.

"I'm not talking about any of this," Sorenson said when reached at his home Thursday afternoon. "I know nothing about how people were paid in the campaign."

Asked if he was paid by the campaign, Sorenson responded, "No. This has been hashed out over the last year and a half. You can look at the articles. I stand by all my previous statements."

Waldron claims the payments were funneled through a third party, C&M Strategies of Colorado operated by Guy Short. In essence, Waldron said, the Bachmann campaign would overpay C&M Strategies for its work and C&M Strategies would then cut a check to Sorenson for his work on behalf of the Bachmann campaign.

If true, the alleged scheme may violate the Senate ethics rule against state senators being employed by political campaigns.